MikeB on 01 July 2008
@ Nj5
@MikeB: My point still stands, that's not a PS3 Cell, it has 8 SPEs instead of 6.
Again look at figure 5f, the cores show linear performance increase. You can easily determine how much double precision performance you get from 6 SPEs in this situation.
Of course the PS3 has 2 more active CPUs in addition to 6 SPEs, the PPE and one additional SPE used in the background by the CellOS.
But as always, you cherry pick part of my replies and ignore the parts which prove you wrong. PS3's SPEs are simply not as good for double-precision calculations as other CPU cores are, and the paper states that quite clearly. It's still a fantastic processor for single-precision, but that's not what we were discussing.
The Cell's double precision performance is also remarkable, way more than you could achieve with the Xenon.
The Cell is good at double precision format calculations, but really shines supreme at half- and single precision.
